Can you clarify issues regarding man's pre-existence, the cause of consciousness after birth, the justice of eternal torment for disbelievers, man's responsibility in a short life that leads to eternal torment, God's justice towards non-accountable beings, the fate of those who could not believe due to life's preoccupations, the issue of free will and predestination in guidance, and how to understand the Qur'anic miraculousness, including short verses and disconnected letters?

You must strive against the whispers of doubt, which are a struggle between the son of Adam and his companion (Qareen). Certainty is not removed by doubt, and truths are not removed by whispers.

It is not possible to comprehend the wisdom in all of Allah Almighty's actions, and the inability to comprehend wisdom does not necessitate its non-existence.

The eternity of the people of Hellfire is pure justice, because the punishment is commensurate with the sin. Disbelief is a grave sin, and disbelievers deserve eternal torment because their disbelief is inherent to them.

Allah's decree of afflictions upon creation does not contradict justice. Allah is All-Wise and is not questioned about what He does.

Man is facilitated for what he was created for, and he has the ability to do good or evil by his will and power that Allah created within him.

Allah created people, some of whom are believers and some disbelievers, in accordance with justice, as He gave them the ability, will, and discernment between truth and falsehood. Then He grants His grace to whomever He wills.

The Companions' belief in the Prophet, may Allah's peace and blessings be upon him, was not based solely on scientific miracles, but on multiple proofs of prophethood, such as miracles (the Noble Qur'an), the glad tidings of previous prophets, the Prophet's character and the nature of his Sharia, and the impossibility of the Qur'an emanating from an illiterate person.

It is advisable to seek religious knowledge from its qualified scholars and to stop reading specious arguments, in order to acquire the scale by which you can weigh and refute these specious arguments.